Preheat oven to 400°F.
Whisk eggs, heavy cream, salt and pepper in a bowl and set aside.
Preheat 10” heavy skillet (preferably cast-iron). Crumble ground beef and sauté for 5 minutes.
Using a slotted spoon, transfer ground beef to a bowl. Keep the skillet on medium-high heat, and add scallions, red pepper, corn and southwest seasoning. Sauté vegetables in beef fat for 3 minutes. Return ground beef to skillet, and mix together.
Spread out the ground beef mixture evenly, flattening with a spatula. Sprinkle cheese on top.
Pour egg mixture into the skillet, and shake pan to distribute egg. Place halved cherry tomatoes in a circular pattern on top.
Place in oven and bake for 16 minutes. Let frittata rest for 4 minutes before slicing.
Serve with a simple green salad, and enjoy!